Rotary cutter.



J. L. MEGATHLIN.

ROTARY CUTTER.

APPLICATION FILED APR. H, 1916.

Patented Feb. 20, 1917.

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1 L. MEGATHLIN. I ROTARY CUTTER. APPLICATION FILED APR. 11. I916. 1,217,108. Patented Feb. 20, 1917.

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JESSE Ew s ivrnsra'rnn mor IAMfrLoiiin AssIen'on or onn-roun'rn ToJQw.

COOK, ONE-FOURTH TO J. arses, Ann ONE-FOURTH To J. A wALnEoK,

nornnx surreal To all whom it may concern:

- 1 Be itr known that I, Jnssn LEWIS Mn- VGATHLINQZL citizenof the United States,"re siding at Miami, in the countyof Dade and State of Florida, have invented certain new and useful lmprovementszinRotary Cutters; and I do hereby declare the following to be a full, clear, and'exact description of. the

invention, such as will enable others skilled in the art to which it appertains to make and use the same. g

'Myinvention relates to new and useful improvements in rotary cutters and 1 more particularly to that classadapted to be used 1 for loosening soil, gravel, rock and similar substances and is adapted primarily for use in connection with a dredging machine, and my object is to provide a rotary cutting head "and mount the same upon the end of'a frame.

A further object is to provide a plurality of cutting disks and rotatably'mount the same upon the cutting head wherebyv they will be carried in a circular path with the cutter head and in.'advance of the cutting teeth of the cutter head. 1 Z .A further object is to provide means for rotating the cutting disks independently of the rotation of the cutter head andat a greater speed than the rotating speed of the cutter head. a V

And a further object is to provide means to cause the disks to rotate in the same difiection of travel as the teeth of the cutter ead. I

Other objects and advantages will be hereinafter set forth and more particularly pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,

ing parts throughout the several views, 1 7

indicates the cutter head which preferably comprises cylindrical ring sections 2 and 3 ture'9, said frame structure having an open zouter end of the beam can be raised or lowered to regulate the position of thecutter lar :device may said cog wheel being preferably constructed Specification of Letters Patent. Pafient'd jieb,20,1917, Application filed April 11, 191e. Seria1N0.90,479.

The ring section gages a' collar '8 carried a frame strucing 10 through its axial center through xwhich the shaft6 projects, the collar 8 forming'a bearing forthe inner end of the cutter head. The frame structure 9 is attached to beams 11, said beams supporting the-framework and shaft 6, the beam structure being of the usual formation employed with 'dredges and the like, the inner ends of the beams being preferably hinged sothat the head, the frame structure 9 havinga-rod l2 3 is provided with a hub 5 which is mounted upon one end of a driving shaft 6, while the ring section '2 is -pro- 'vided with a circular seat 7 with-whichen- 1 which are connected. together by cutting 7 blades 4, said ring sections and cutting blades forming a substantially A cylindrical to w'hicha' cable not shown) or other simi V be attached forraising and lowering the beam structure.

Mounted upon'the peripheryof the ring sections 2 :and 3 are boxings 13 through j which extend shafts 14, said shafts having a plurality of cutting disks 15 mounted thereon and adapted to rotate with the shaft,

the teeth-of one cutting disk being staggered with relation to the teeth of the next succeeding-dislnthe cutting faces ofsaid disks beingat right angles to the cutting edges of the blades r The shafts 14: and: disks carriedthereby are rotated by attaching gears 16 to the inner ends of said shafts, which gears mesh with a cog wheel 17 carried by the collar 8,

of segmental rack sections, which when properly assembled form a circular cog.

The shafts 14 and cutting disks carried thereby are caused to rotate in the same direction as the line of travel of the cutting when the cutting blades 48116011111381 the strips of soil, etc, left by the cutting disk, they will be readily removed and separated from the main body by the cutting blades.

In operation, power is applied to the shaft 8, after which the cutter head is lowered into operative position or until the cutting blades and cutting disks are in engagement With the soil or other substance tobe removed,

and in 'vieW ofthe rotation of the cutter head and the cutting disks the object encountered thereby Will be disintegrated so thatit can be immediately removed by. suction or otherwise, and in view of the rapidity with which the disks 15 are rotated, .extremely hard substances will be cut into strips or so channeled that the cutting blades Will-readily-remove the projecting portions of the "solid object, and When smaller stones or solid particles are encountered, the cutting disks-will or rotationof the cutting:disks'the'substances will be thoroughly disintegrated While the cutting blades Will readily-move the disintegrated particles into'position'to be removed by suction orotherwise.

Having'thus fully describedmy invention What I claim as neW and desire to secure by Letters Patent of the United States, is z 1. In a rotary cutter, the combination'vvi'th a cutter 'headhaving cutting blades, and means to rotate the. cutter head, of a-plurality of rotatableshafts extending parallel to the cutting blades and-journaled on the jcutter head, a plurality of cutting disks attached to each shaft, and means to rotate said shafts at a greater speed "than that of the cutterhead.

2. A rotary cutter comprising the combination with a rotary cutter head, a plurality ofcuttingblades attached to said .head, and

' a drive'shaft to Which the cutter head is attaehedyof plurality of shafts rotatably attached to the cutter head, a plurality of cutting disks atta'ehed -to each of said latter shafts,-'and means to rotate theshafts carry- -111gtl1ci1tt1i1g.dlSkS 1n: ate greater rate of "speednand 1n thesame d rection as the-cutter head. V

Arota-ry cuttercomprising the combinati'on W-itlr a cutter head formedof a pair of ring sections, and cutting blades connecting' said ring sections, of -'a plurality of shafts rotatably mounted on said ring sections, a plurality of cutting disks carried byeach shaft,==and means to cause said shafts and cuttingdisks, to rotate in the same direction as'the ro-tation'of the cutter head *W'llQH I said' cutter head is rotated.

' l. 'i rcutting device comprising the combinationwvith a-shaft, a frame structure on Sald g sh'aft, a collar carried by the frame structure, and a-cog Wheel on'said collar, of

a cutter head having a seat in one end for the-reception of thecollar', saidcu-tter head being fixed to'the'shaft, a plurality of shafts -rotatably -mounted onwthecutter head, aplurality off' cu't-ting di'sks carried by each of said latter shaftsyand-vgears attached to said latter shafts and meshing-Withisaidcog Wheel: adapted-=to rotate said latter-shafts wheirthe' cutterr head is rotated.

'In testimony whereof- '1 have signed my name to 1 this: specification.

JESSE LEWIS MEGAQ'EHLIN. 

